Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 13 of 13 for “"Causal modelling"”.
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Setting location priors using beamforming improves model comparison in MEG-DCM
Modelling neuronal interactions using a directed network can be used to provide insight into the activity of the brain during experimental tasks. Magnetoencephalography (MEG) allows for the observation of the fast neuronal dynamics necessary to characterize the activity of sources and their …
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Age-Related Changes to the P3a and P3b
… processing. In chapter 3, we use dynamic causal modelling (DCM) to examine the network dynamics responsible for the generation of the P3a and P3b, and explore how these dynamics change during the course of healthy aging. In chapter 4, we use two commonly used graph theory metrics to …
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Analysing the effects of debt financing on fiscal sustainability of the City of Windhoek
… and Dendrograms. The study then used temporal causal modelling and ARDL model estimation to establish the nature of relationships between fiscal sustainability and debt burden indicators within the context of financial independence. The study found evidence of both long-term and short-term …
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Advances in Latent Variable and Causal Models
… areas of machine learning concerned with the modelling of data, extending theoretical understanding in each of them. First, the estimation of f- divergences is considered in a setting that is naturally satisfied in the context of autoencoders. By exploiting structural assumptions on the …
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Machine Learning Methods for Cancer Immunology
… the second part of the dissertation introduces a causal modelling approach to infer directed interactions between signaling pathway activity and immune agency. This is achieved by anchoring the analysis on somatic genomic changes. In particular, copy number profiles, transcriptomic data, image …
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Partnering Attractiveness In Buyer-seller Relationships
… and channel relationship theory, a comprehensive causal model of antecedent constructs to partnering attractiveness was developed. Data were gathered from a cross-section of purchasing people across southwestern Ontario involved in the purchasing of stationery and office supplies, and welding …
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Electrophysiological Markers of Sensory Plasticity and Connectomics in Ageing and Mild Cognitive Impairment
… using electroencephalography (EEG) and Dynamic Causal Modelling (DCM) and 2) explore the utility of these measures in distinguishing between healthy ageing, and potential latent neuropathology in those classified with amnestic Mild Cognitive Impairment (aMCI); an 'at risk' group for Alzheimer's …
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The Role of the Basal Ganglia in Memory and Motor Inhibition
… prevention and cancellation. Through dynamic causal modelling (DCM), we found that both DLPFC and basal ganglia play effective roles to achieve inhibition in the task-specific regions (hippocampus for memory inhibition; primary motor cortex (M1) for motor inhibition). Specifically, memory …
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Uncovering Dynamic Semantic Networks in the Brain Using Novel Approaches for EEG/MEG Connectome Reconstruction
… semantic areas. This was observed using Dynamic Causal Modelling of connectivity among the main left-hemispheric candidate hubs and modulations of functional connectivity of ATL and AG to semantic spokes by word concreteness. Furthermore, examining whole-brain connectomes using measures of graph …
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The prevalence and sources of perceived occupational stress among teachers in Western Australian government metropolitan primary schools
… analysis. The process of structural equation or causal modelling forms the final section of this chapter. The outcomes which emerged from the study are analysed in relation to both the quantitative and qualitative data obtained during the investigation. In respect to the former these outcomes …
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Mechanistic Connectomics in Drosophila
… uses synaptic-resolution connectomes in a causal manner to explain circuit function. Multiple connectomes now exist for the adult fruit fly, \textit{Drosophila melanogaster}. This thesis develops statistics and analyses for Mechanistic Connectomics using these datasets to analyse the …
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The effect of Alzheimer's disease on cortical microcircuits
… To this end, biophysically-informed dynamic causal models can support inferences around laminar and cell-specific disease effects from human non-invasive imaging. This thesis aims to use dynamic causal models to elucidate cellular-level effects of Alzheimer’s disease on cognition to (i) …
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Natural counterfactual explanations with causal awareness and actionable recourse for black-box models.
… infeasible for end-users, or neglect underlying causal relationships within the data, thereby limiting their real-world utility and trustworthiness. This thesis systematically addresses these critical limitations by developing and validating a multi-faceted framework for generating natural …